linux-kernel - Re: [PATCH v2 2/7] dt-bindings: phy: Add binding for Qualcomm PCIe2 PHY

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Date:   Fri, 22 Feb 2019 13:57:58 -0600
From:   Rob Herring <robh@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Mark Rutland <mark.rutland@....com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 2/7] dt-bindings: phy: Add binding for Qualcomm PCIe2
 PHY

On Mon, Feb 18, 2019 at 10:04:02PM -0800, Bjorn Andersson wrote:
> The Qualcomm PCIe2 PHY is a Synopsys based PCIe PHY found in a number of
> Qualcomm platforms, add a binding to describe this.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  .../bindings/phy/qcom-pcie2-phy.txt           | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt b/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt
> new file mode 100644
> index 000000000000..7da02f9d78c7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom-pcie2-phy.txt
> @@ -0,0 +1,40 @@
> +Qualcomm PCIe2 PHY controller
> +=============================
> +
> +The Qualcomm PCIe2 PHY is a Synopsys based phy found in a number of Qualcomm
> +platforms.
> +
> +Required properties:
> + - compatible: compatible list, should be:
> +	       "qcom,qcs404-pcie2-phy", "qcom,pcie2-phy"
> +
> + - reg: offset and length of the PHY register set.
> + - #phy-cells: must be 0.
> +
> + - clocks: a clock-specifier pair for the "pipe" clock
> +
> + - vdda-vp-supply: phandle to low voltage regulator
> + - vdda-vph-supply: phandle to high voltage regulator
> +
> + - resets: reset-specifier pairs for the "phy" and "pipe" resets
> + - reset-names: list of resets, should contain:
> +		"phy" and "pipe"
> +
> + - clock-output-names: name of the outgoing clock signal from the PHY PLL

Not valid to have this without '#clock-cells'.

Though I'm confused how this and the input clock name seem to match.

> +
> +Example:
> + phy@...6000 {
> +	compatible = "qcom,qcs404-pcie2-phy", "qcom,pcie2-phy";
> +	reg = <0x07786000 0xb8>;
> +
> +	clocks = <&gcc GCC_PCIE_0_PIPE_CLK>;
> +	resets = <&gcc GCC_PCIEPHY_0_PHY_BCR>,
> +	         <&gcc GCC_PCIE_0_PIPE_ARES>;
> +	reset-names = "phy", "pipe";
> +
> +	vdda-vp-supply = <&vreg_l3_1p05>;
> +	vdda-vph-supply = <&vreg_l5_1p8>;
> +
> +	clock-output-names = "pcie_0_pipe_clk";
> +	#phy-cells = <0>;
> + };
> -- 
> 2.18.0
>